Aims.This work presents a uniform and homogeneous study of chemical abundances of refractory elements in 101 stars with and 93 without known planetary companions. We carry out an in-depth investigation of the abundances of Si, Ca, Sc, Ti, V, Cr, Mn, Co, Ni, Na, Mg and Al. The new comparison sample, spanning the metallicity range FeH, fills the gap that previously existed, mainly at high metallicities, in the number of stars without known planets.Methods.We used an enlarged set of data including new observations, especially for the field “single” comparison stars . The line list
previously studied by other authors was improved: on average we analysed 90 spectral lines in every spectrum and carefully measured more than 16 600 equivalent
widths (EW) to calculate the abundances.Results.We investigate possible differences between the chemical abundances of the two groups of stars, both with and without planets. The
results are globally comparable to those obtained by other authors, and in most cases the abundance trends of planet-host stars are
very similar to those of the comparison sample. Conclusions.This work represents a step towards the comprehension of recently discovered planetary
systems. These results could also be useful for verifying galactic models at high metallicities and consequently improve our knowledge of
stellar nucleosynthesis and galactic chemical evolution.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.